2019 changes to the Rent Stabilization Law under then-Gov. Andrew Cuomo made even vacant apartments subject to rent regulation if their buildings were built before 1974. Helayne Seidman

Small-property owners are suing New York, city and state, in federal court, aiming to get tens of thousands of their “zombie” apartments back on the market.

Pray they win; tenants desperately need that housing — and local politicians need a warning about how their excess are endangering all the rent laws.

The problem: 2019 changes to the Rent Stabilization Law under then-Gov. Andrew Cuomo made even vacant apartments subject to rent regulation if their buildings were built before 1974 (which covers about a million units).

Those “reforms” also severely restricted how much of the costs for repairs and

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